Telescopic hydraulic cylinder

Abstract

The utility model relates to the technical field of hydraulic cylinders, in particular to a telescopic hydraulic cylinder. The telescopic hydraulic cylinder comprises a cylinder barrel and a multi-stage piston rod installed in the cylinder barrel. A support assembly is arranged on the cylinder barrel and comprises four sleeving rings, a middle connecting plate is fixedly erected among the sleeving rings, side frame plates are fixedly mounted at the bottoms of the middle connecting plate, and mounting base plates are fixedly mounted at the bottoms of the side frame plates. According to the telescopic hydraulic cylinder, when the supporting pressure borne by the telescopic hydraulic cylinder is larger than the welding pressure value of the limiting welding plate on the arc-shaped plate, the limiting welding plate above the arc-shaped plate is subjected to unsoldering, and therefore the inserting seat on the middle connecting plate slides upwards along the sliding groove; and after the pressure column is pressed to the pressure sensor, the voice alarm gives an early warning, so that a worker can carry out emergency treatment on the telescopic hydraulic cylinder, and the safety of the telescopic hydraulic cylinder during working is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a telescopic hydraulic cylinder. Background Art

[0002] The telescopic hydraulic cylinder is composed of two or more piston-type hydraulic cylinders sleeved together. The piston rod of the previous-stage piston cylinder is the cylinder barrel of the next-stage piston cylinder. This design enables the hydraulic cylinder to gradually increase the effective area when extending, so as to generate a greater thrust under the same pressure, and at the same time enhances its compressive performance. However, when the telescopic hydraulic cylinder is under pressure in some special environments greater than the pressure value that the telescopic hydraulic cylinder can bear, there is a hidden danger of cylinder explosion, which not only damages the telescopic hydraulic cylinder but also easily induces safety accidents.

[0003] Therefore, it is necessary to provide a new telescopic hydraulic cylinder to solve the above technical problems. Content of the Utility Model

[0004] To solve the above technical problems, the utility model provides a telescopic hydraulic cylinder.

[0005] The telescopic hydraulic cylinder provided by the utility model includes:

[0006] A cylinder barrel, and

[0007] A multi-stage piston rod installed in the cylinder barrel;

[0008] A bracket assembly is arranged on the cylinder barrel, and the bracket assembly includes socket rings. There are four socket rings, and intermediate connection plates are fixedly installed between four adjacent socket rings. A side bracket plate is fixedly installed at the bottom of each intermediate connection plate, and an installation chassis is fixedly installed at the bottom of the side bracket plate;

[0009] A pressure sensor and a voice alarm are installed on the cylinder barrel, and a limit assembly for restricting the position of the intermediate connection plate is also installed on the cylinder barrel.

[0010] Preferably, end covers and a tail cover are respectively fixedly installed at the top and bottom of the cylinder barrel, and a sliding rod is fixedly installed between the end covers and the tail cover. Two symmetrically distributed sliding grooves are formed on the outer barrel wall of the cylinder barrel.

[0011] Preferably, four adjacent socket rings are respectively sleeved on the sliding rod and are slidably connected with the sliding rod. Insertion seats are installed on two symmetrically distributed intermediate connection plates, and the two insertion seats are respectively inserted into the sliding grooves formed in the cylinder barrel and are slidably connected with the sliding grooves.

[0012] Preferably, pressure columns are fixedly installed on both of the intermediate connection plates inserted into the sliding grooves, and pressure sensors are fixedly installed on the inner top walls of the sliding grooves. The pressure sensors are electrically connected to a voice alarm.

[0013] Preferably, two sets of limiting components are provided and symmetrically distributed on both sides of the cylinder barrel. The limiting component includes an arc-shaped plate and a limiting welding plate, and two symmetrically distributed limiting welding plates are fixedly installed on the arc-shaped plate.

[0014] Preferably, the arc-shaped plate is fixedly installed on the outer barrel wall of the cylinder barrel, and the limiting welding plates on the arc-shaped plate are respectively located on the upper and lower sides of the intermediate connection plate without the inserted seat.

[0015] Compared with the related art, the telescopic hydraulic cylinder provided by the present utility model has the following beneficial effects:

[0016] When the support pressure received by the telescopic hydraulic cylinder of the present utility model is greater than the welding pressure value of the limiting welding plate on the arc-shaped plate, the limiting welding plate above the arc-shaped plate is de-welded. Therefore, the inserted seat on the intermediate connection plate slides upward along the sliding groove until the pressure column presses on the pressure sensor and its voice alarm gives an early warning. Thus, the staff can timely carry out emergency treatment on the telescopic hydraulic cylinder, so the safety of the telescopic hydraulic cylinder during operation is effectively improved. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a preferred embodiment of the telescopic hydraulic cylinder provided by the present utility model;

[0018] Figure 2 is Figure 1 the schematic structural diagram of the hydraulic cylinder shown;

[0019] Figure 3 is Figure 1 the schematic structural diagram of the bracket assembly shown;

[0020] Figure 4 is Figure 1 the schematic structural diagram of the limiting component shown.

[0021] Reference numerals in the drawings: 1, cylinder barrel; 1a, sliding groove; 11, end cover; 12, tail cover; 13, sliding rod; 2, multi-stage piston rod; 3, bracket assembly; 31, socket ring; 32, intermediate connection plate; 33, side frame plate; 34, installation chassis; 35, inserted seat; 4, pressure column; 5, pressure sensor; 6, voice alarm; 7, limiting component; 71, arc-shaped plate; 72, limiting welding plate. Detailed Embodiments

[0022] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] The following describes in detail the specific implementation of the present utility model in conjunction with specific embodiments.

[0024] Please refer to Figures 1 to 4 , a telescopic hydraulic cylinder provided by an embodiment of the present utility model, the telescopic hydraulic cylinder includes: a cylinder barrel 1, a multi-stage piston rod 2, a bracket assembly 3 and a limit assembly 7.

[0025] In an embodiment of the present utility model, please refer to Figures 1 to 4 , a multi-stage piston rod 2 is installed in the cylinder barrel 1, end covers 11 and a tail cover 12 are respectively fixedly installed at the top and bottom of the cylinder barrel 1, and a sliding rod 13 is fixedly installed between the end cover 11 and the tail cover 12, and two symmetrically distributed sliding grooves 1a are formed on the outer barrel wall of the cylinder barrel 1;

[0026] A bracket assembly 3 is arranged on the cylinder barrel 1, and the bracket assembly 3 includes socket rings 31. There are four socket rings 31, and intermediate connecting plates 32 are fixedly installed between four adjacent socket rings 31. A side frame plate 33 is fixedly installed at the bottom of each intermediate connecting plate 32, and a mounting chassis 34 is fixedly installed at the bottom of the side frame plate 33. Four adjacent socket rings 31 are respectively sleeved on the sliding rod 13 and are slidably connected to the sliding rod 13. Insertion seats 35 are installed on two symmetrically distributed intermediate connecting plates 32, and the two insertion seats 35 are respectively inserted into the sliding grooves 1a formed in the cylinder barrel 1 and are slidably connected to the sliding grooves 1a;

[0027] A pressure sensor 5 and a voice alarm 6 are installed on the cylinder barrel 1, and a limit assembly 7 for restricting the position of the intermediate connecting plate 32 is also installed on the cylinder barrel 1. Specifically, pressure columns 4 are fixedly installed on two intermediate connecting plates inserted into the sliding grooves 1a, and pressure sensors 5 are fixedly installed on the inner top walls of the sliding grooves 1a. The pressure sensors 5 are electrically connected to the voice alarm 6. The limit assembly 7 is provided with two groups and is symmetrically distributed on both sides of the cylinder barrel 1. The limit assembly 7 includes an arc plate 71 and a limit welding plate 72. Two symmetrically distributed limit welding plates 72 are fixedly installed on the arc plate 71. The arc plate 71 is fixedly installed on the outer barrel wall of the cylinder barrel 1, and the limit welding plates 72 on the arc plate 71 are respectively located on the upper and lower sides of the intermediate connecting plate 32 where the insertion seat 35 is not installed.

[0028] It should be noted that: the telescopic hydraulic cylinder is fixedly installed by using screws to pass through the through holes opened in the mounting chassis 34. Due to the limitation of the two intermediate connecting plates 32 by the limit welding plates 72, the support assembly 3 can stably support and install the telescopic hydraulic cylinder;

[0029] A bearing warning value is set on the arc-shaped plate 71 and the limit welding plate 72, and its value range is slightly lower than the cylinder barrel 1 bursting value range (its specific value range is not limited and can be reasonably welded according to the specific type of telescopic hydraulic cylinder, which will not be elaborated here);

[0030] When the support pressure received by the telescopic hydraulic cylinder is greater than the pressure value welded by the limit welding plate 72 on the arc-shaped plate 71, the limit welding plate 72 above the arc-shaped plate 71 is de-welded. Therefore, the insertion seat 35 on the intermediate connecting plate 32 slides up along the sliding groove 1a until the pressure column 4 presses on the pressure sensor 5 and its voice alarm 6 gives an alarm, so that the staff can promptly perform emergency treatment on the telescopic hydraulic cylinder. Therefore, the safety of the telescopic hydraulic cylinder during operation is effectively improved;

[0031] In this embodiment: both the cylinder barrel 1 and the multi-stage piston rod 2 are made of high-strength and high-wear-resistant alloy, so that the telescopic hydraulic cylinder can maintain a stable shape and size under high-pressure environment.

[0032] The working principle of the telescopic hydraulic cylinder provided by the present utility model is as follows:

[0033] The telescopic hydraulic cylinder is fixedly installed by using screws to pass through the through holes opened in the mounting chassis 34. Due to the limitation of the two intermediate connecting plates 32 by the limit welding plates 72, the support assembly 3 can stably support and install the telescopic hydraulic cylinder; A bearing warning value is set on the arc-shaped plate 71 and the limit welding plate 72, and its value range is slightly lower than the cylinder barrel 1 bursting value range (its specific value range is not limited and can be reasonably welded according to the specific type of telescopic hydraulic cylinder, which will not be elaborated here); When the support pressure received by the telescopic hydraulic cylinder is greater than the pressure value welded by the limit welding plate 72 on the arc-shaped plate 71, the limit welding plate 72 above the arc-shaped plate 71 is de-welded. Therefore, the insertion seat 35 on the intermediate connecting plate 32 slides up along the sliding groove 1a until the pressure column 4 presses on the pressure sensor 5 and its voice alarm 6 gives an alarm, so that the staff can promptly perform emergency treatment on the telescopic hydraulic cylinder. Therefore, the safety of the telescopic hydraulic cylinder during operation is effectively improved.

[0034] The circuits and controls involved in the present utility model are all prior arts and will not be elaborated here too much.

[0035] The above are only embodiments of the present utility model, and do not thereby limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. A telescopic hydraulic cylinder, characterized in that, Comprising: A cylinder barrel (1), and A multi-stage piston rod (2) installed inside the cylinder barrel (1); A bracket assembly (3) is provided on the cylinder barrel (1), and the bracket assembly (3) includes a socket ring (31). There are four socket rings (31), and an intermediate connection plate (32) is fixedly installed between four adjacent socket rings (31). A side bracket plate (33) is fixedly installed at the bottom of each intermediate connection plate (32), and a mounting chassis (34) is fixedly installed at the bottom of the side bracket plate (33); A pressure sensor (5) and a voice alarm (6) are installed on the cylinder barrel (1), and a limit assembly (7) for restricting the position of the intermediate connection plate (32) is also installed on the cylinder barrel (1).

2. The telescopic hydraulic cylinder according to claim 1, wherein, An end cover (11) and a tail cover (12) are respectively fixedly installed at the top and bottom of the cylinder barrel (1), and a sliding rod (13) is fixedly installed between the end cover (11) and the tail cover (12). Two symmetrically distributed sliding grooves (1a) are formed on the outer cylinder wall of the cylinder barrel (1).

3. The telescopic hydraulic cylinder according to claim 2, wherein Four adjacent socket rings (31) are respectively sleeved on the sliding rod (13) and are slidably connected to the sliding rod (13). Insertion seats (35) are installed on two symmetrically distributed intermediate connection plates (32), and the two insertion seats (35) are respectively inserted into the sliding grooves (1a) formed in the cylinder barrel (1) and are slidably connected to the sliding grooves (1a).

4. The telescopic hydraulic cylinder according to claim 3, wherein, Pressure columns (4) are fixedly installed on two intermediate connection plates inserted into the sliding grooves (1a), and pressure sensors (5) are fixedly installed on the inner top walls of the sliding grooves (1a). The pressure sensors (5) are electrically connected to the voice alarm (6).

5. The telescopic hydraulic cylinder according to claim 3, characterized in that, There are two groups of the limit assemblies (7) and they are symmetrically distributed on both sides of the cylinder barrel (1). The limit assembly (7) includes an arc-shaped plate (71) and a limit welding plate (72). Two symmetrically distributed limit welding plates (72) are fixedly installed on the arc-shaped plate (71).

6. The telescopic hydraulic cylinder according to claim 5, wherein The arc-shaped plate (71) is fixedly installed on the outer cylinder wall of the cylinder barrel (1), and the limit welding plates (72) on the arc-shaped plate (71) are respectively located on the upper and lower sides of the intermediate connection plate (32) without the insertion seat (35) installed.

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